In this study, the macro steel fiber (SF), carbon fiber (CF) and nano carbon black (NCB) as triphasic conductive materials were added into concrete, in order to improve the conductivity and ductility of concrete. The influence of NCB, SF and CF on the post crack behavior and conductivity of concrete was explored. The effect of the triphasic conductive materials on the self-diagnosing ability to the load–deflection property and crack widening of conductive concrete member subjected to bending were investigated. The relationship between the fractional change in surface impedance (FCR) and the crack opening displacement (COD) of concrete beams with conductive materials has been established. The results illustrated that there is a linear relationship between COD and FCR.

About CTAC

The Centre for Territory, Environment and Construction (CTAC) is a R&D unit of the School of Engineering of University of Minho, recognised by the “FCT – Fundação para a Ciência e Tecnologia” (Foundation for Science and Technology), dedicated to research in the field of civil engineering, integrating as members 32 faculty staff from the department of civil engineering, as well as postdoctoral staff, externally funded researchers and postgraduate students. [more]